?
Solved

Non-Defined Subdomains

Posted on 2011-03-05
3
Medium Priority
?
263 Views
Last Modified: 2012-05-11
How can I force my website to not function when there is a subdomain that is not in the dns.

ex//

test.domain.com <- invalice
mail.domain.com <-valid

how can I force test.domain to go to domain.com is this a dns issue or a server setting?
0
Comment
Question by:cstormer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 31

Expert Comment

by:farzanj
ID: 35044633
Try iptables

If the entry is not in the DNS, it should not get a reply.

Block Invalid
iptables -A -p tcp -d test.domain.com --dport 80 -j DROP

Open in new window


Forwarding to another domain
iptables -t nat -A PREROUTING -d test.domain -p tcp --dport 80 -j DNAT --to domain.com

Open in new window

0
 

Author Comment

by:cstormer
ID: 35060167
A follow up question is which is better from an SEO point of view?

Is it better to make all the sites with broken links that point to my domain still function if someone clicks on the link or Google comes in off that link... by having them redirect to the domain.com version.

Basically..

badtext.domain.com/page/page.php = .domain.com/page/page.php

Is that more of a URL rewrite... issue or should i just make anything that does not point to the right domain not work..
0
 
LVL 9

Accepted Solution

by:
jeremycrussell earned 2000 total points
ID: 35060699
Ok, so, unless you have some type of DNS record to cover all the possible <text>.domain.com the, when they are entered, they won't resolve.

To accomplish what you mentioned, you could do this by having A or CNAME records for your "valid" FQDNs, and then use a wildcard A record, assuming your DNS provider supports that.

Then, you could use some rewrite rules send "invalid" FQDNs to a particular page.

For instance, with Apache and mod_rewrite.

RewriteEngine On
RewriteCond %{HTTP_HOST} !^domain.com$
RewriteCond %{HTTP_HOST} !^www.domain.com$  (you would have a rewrite condition for all your "valid" subdomains.
RewriteRule ^(.*) http://domain.com/$1

0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

As Wikipedia explains 'robots.txt' as -- the robot exclusion standard, also known as the Robots Exclusion Protocol or robots.txt protocol, is a convention to prevent cooperating web spiders and other web robots from accessing all or part of a websit…
If you have a multi-homed DNS setup in windows, you can have issues with connectivity to the server that hosts the DNS services (or even member servers of your domain if this same DNS server is a DC). This is because windows registers all of its IPs…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…
Suggested Courses
Course of the Month8 days, 17 hours left to enroll

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question